Class: Dat::Analysis::Tally

Inherits:
Object
  • Object
show all
Defined in:
lib/dat/analysis/tally.rb

Overview

Internal: Track and summarize counts of occurrences of mismatch objects.

Examples

tally = Dat::Analysis::Tally.new
tally.count('foo')
=> 1
tally.count('bar')
=> 1
tally.count('foo')
=> 2
puts tally.summary
Summary of known mismatches found:
foo	2
bar	1
TOTAL:	3
=> nil

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Tally

Returns a new instance of Tally.



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# File 'lib/dat/analysis/tally.rb', line 25

def initialize
  @tally = {}
end

Instance Attribute Details

#tally ⇒ Object (readonly)

Public: Returns the hash of recorded mismatches.



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# File 'lib/dat/analysis/tally.rb', line 23

def tally
  @tally
end

Instance Method Details

#count(klass) ⇒ Object

Public: record an occurrence of a mismatch class.



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# File 'lib/dat/analysis/tally.rb', line 30

def count(klass)
  tally[klass] ||= 0
  tally[klass] += 1
end

#summarize ⇒ Object

Public: prints a summary of mismatches seen so far to STDOUT (see ‘#summary` above).

Returns nil.



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# File 'lib/dat/analysis/tally.rb', line 55

def summarize
  puts summary
end

#summary ⇒ Object

Public: Return a String summary of mismatches seen so far.

Returns a printable String summarizing the counts of mismatches seen, sorted in descending count order.



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# File 'lib/dat/analysis/tally.rb', line 39

def summary
  return "\nNo results identified.\n" if tally.keys.empty?
  result = [ "\nSummary of identified results:\n" ]
  sum = 0
  tally.keys.sort_by {|k| -1*tally[k] }.each do |k|
    sum += tally[k]
    result << "%30s: %6d" % [k, tally[k]]
  end
  result << "%30s: %6d" % ['TOTAL', sum]
  result.join "\n"
end